package com.arron.algorithm.huawei.简单;

import javax.print.DocFlavor;

public class 计算某字符出现次数 {


    public static void main(String[] args) {
        String str = "asasas1212A";

        str.equalsIgnoreCase("A");
        Character.toLowerCase('1');
        Character.toUpperCase('a');

    }
}
